Abstract
Hospital information system (HIS) with clinical decision support system (CDSS) is essential for providing safe and high quality care to patients. However, method how to incorporate CDSS into HIS is not fully established, and is still under consideration in most of medical institutions. In this paper, we describe about our data ware house (DWH) system for CDSS based on knowledge base technology, and discusses methodologies of integrating it with present HIS.